BUG: Fix for Cookie expiry timeout being passed as a large number on 64 bit machines
Merge pull request #2127 from silverstripe-rebelalliance/cookietimestamp

BUG: Fix for Cookie expiry timeout being passed as a large number on 64 ...
Add a note on the unit of the Session.timeout.
Merge pull request #2132 from mateusz/note

Add a note on the unit of the Session.timeout.